Faster than ever, PowerBook G4 computers all feature PowerPC G4 processors that provide robust performance for complex multimedia or data intensive applications. The 15-inch and 17-inch models boast processor speeds of up to 1.5GHz, and the 12-inch model now offers speedier performance with its 1.33GHz processor and new 1.67MHz system bus.
1.67? isn't that the new processor speed - that makes the bus look even worse!!!